bss_file.c revision 160814
1/* crypto/bio/bss_file.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59/* 60 * 03-Dec-1997 rdenny@dc3.com Fix bug preventing use of stdin/stdout 61 * with binary data (e.g. asn1parse -inform DER < xxx) under 62 * Windows 63 */ 64 65#ifndef HEADER_BSS_FILE_C 66#define HEADER_BSS_FILE_C 67 68#if defined(__linux) || defined(__sun) || defined(__hpux) 69/* Following definition aliases fopen to fopen64 on above mentioned 70 * platforms. This makes it possible to open and sequentially access 71 * files larger than 2GB from 32-bit application. It does not allow to 72 * traverse them beyond 2GB with fseek/ftell, but on the other hand *no* 73 * 32-bit platform permits that, not with fseek/ftell. Not to mention 74 * that breaking 2GB limit for seeking would require surgery to *our* 75 * API. But sequential access suffices for practical cases when you 76 * can run into large files, such as fingerprinting, so we can let API 77 * alone. For reference, the list of 32-bit platforms which allow for 78 * sequential access of large files without extra "magic" comprise *BSD, 79 * Darwin, IRIX... 80 */ 81#ifndef _FILE_OFFSET_BITS 82#define _FILE_OFFSET_BITS 64 83#endif 84#endif 85 86#include <stdio.h> 87#include <errno.h> 88#include "cryptlib.h" 89#include "bio_lcl.h" 90#include <openssl/err.h> 91 92#if !defined(OPENSSL_NO_STDIO) 93 94static int MS_CALLBACK file_write(BIO *h, const char *buf, int num); 95static int MS_CALLBACK file_read(BIO *h, char *buf, int size); 96static int MS_CALLBACK file_puts(BIO *h, const char *str); 97static int MS_CALLBACK file_gets(BIO *h, char *str, int size); 98static long MS_CALLBACK file_ctrl(BIO *h, int cmd, long arg1, void *arg2); 99static int MS_CALLBACK file_new(BIO *h); 100static int MS_CALLBACK file_free(BIO *data); 101static BIO_METHOD methods_filep= 102 { 103 BIO_TYPE_FILE, 104 "FILE pointer", 105 file_write, 106 file_read, 107 file_puts, 108 file_gets, 109 file_ctrl, 110 file_new, 111 file_free, 112 NULL, 113 }; 114 115BIO *BIO_new_file(const char *filename, const char *mode) 116 { 117 BIO *ret; 118 FILE *file; 119 120 if ((file=fopen(filename,mode)) == NULL) 121 { 122 SYSerr(SYS_F_FOPEN,get_last_sys_error()); 123 ERR_add_error_data(5,"fopen('",filename,"','",mode,"')"); 124 if (errno == ENOENT) 125 BIOerr(BIO_F_BIO_NEW_FILE,BIO_R_NO_SUCH_FILE); 126 else 127 BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB); 128 return(NULL); 129 } 130 if ((ret=BIO_new(BIO_s_file_internal())) == NULL) 131 { 132 fclose(file); 133 return(NULL); 134 } 135 136 BIO_clear_flags(ret,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */ 137 BIO_set_fp(ret,file,BIO_CLOSE); 138 return(ret); 139 } 140 141BIO *BIO_new_fp(FILE *stream, int close_flag) 142 { 143 BIO *ret; 144 145 if ((ret=BIO_new(BIO_s_file())) == NULL) 146 return(NULL); 147 148 BIO_set_flags(ret,BIO_FLAGS_UPLINK); /* redundant, left for documentation puposes */ 149 BIO_set_fp(ret,stream,close_flag); 150 return(ret); 151 } 152 153BIO_METHOD *BIO_s_file(void) 154 { 155 return(&methods_filep); 156 } 157 158static int MS_CALLBACK file_new(BIO *bi) 159 { 160 bi->init=0; 161 bi->num=0; 162 bi->ptr=NULL; 163 bi->flags=BIO_FLAGS_UPLINK; /* default to UPLINK */ 164 return(1); 165 } 166 167static int MS_CALLBACK file_free(BIO *a) 168 { 169 if (a == NULL) return(0); 170 if (a->shutdown) 171 { 172 if ((a->init) && (a->ptr != NULL)) 173 { 174 if (a->flags&BIO_FLAGS_UPLINK) 175 UP_fclose (a->ptr); 176 else 177 fclose (a->ptr); 178 a->ptr=NULL; 179 a->flags=BIO_FLAGS_UPLINK; 180 } 181 a->init=0; 182 } 183 return(1); 184 } 185 186static int MS_CALLBACK file_read(BIO *b, char *out, int outl) 187 { 188 int ret=0; 189 190 if (b->init && (out != NULL)) 191 { 192 if (b->flags&BIO_FLAGS_UPLINK) 193 ret=UP_fread(out,1,(int)outl,b->ptr); 194 else 195 ret=fread(out,1,(int)outl,(FILE *)b->ptr); 196 if(ret == 0 && (b->flags&BIO_FLAGS_UPLINK)?UP_ferror((FILE *)b->ptr):ferror((FILE *)b->ptr)) 197 { 198 SYSerr(SYS_F_FREAD,get_last_sys_error()); 199 BIOerr(BIO_F_FILE_READ,ERR_R_SYS_LIB); 200 ret=-1; 201 } 202 } 203 return(ret); 204 } 205 206static int MS_CALLBACK file_write(BIO *b, const char *in, int inl) 207 { 208 int ret=0; 209 210 if (b->init && (in != NULL)) 211 { 212 if (b->flags&BIO_FLAGS_UPLINK) 213 ret=UP_fwrite(in,(int)inl,1,b->ptr); 214 else 215 ret=fwrite(in,(int)inl,1,(FILE *)b->ptr); 216 if (ret) 217 ret=inl; 218 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */ 219 /* according to Tim Hudson <tjh@cryptsoft.com>, the commented 220 * out version above can cause 'inl' write calls under 221 * some stupid stdio implementations (VMS) */ 222 } 223 return(ret); 224 } 225 226static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr) 227 { 228 long ret=1; 229 FILE *fp=(FILE *)b->ptr; 230 FILE **fpp; 231 char p[4]; 232 233 switch (cmd) 234 { 235 case BIO_C_FILE_SEEK: 236 case BIO_CTRL_RESET: 237 if (b->flags&BIO_FLAGS_UPLINK) 238 ret=(long)UP_fseek(b->ptr,num,0); 239 else 240 ret=(long)fseek(fp,num,0); 241 break; 242 case BIO_CTRL_EOF: 243 if (b->flags&BIO_FLAGS_UPLINK) 244 ret=(long)UP_feof(fp); 245 else 246 ret=(long)feof(fp); 247 break; 248 case BIO_C_FILE_TELL: 249 case BIO_CTRL_INFO: 250 if (b->flags&BIO_FLAGS_UPLINK) 251 ret=UP_ftell(b->ptr); 252 else 253 ret=ftell(fp); 254 break; 255 case BIO_C_SET_FILE_PTR: 256 file_free(b); 257 b->shutdown=(int)num&BIO_CLOSE; 258 b->ptr=ptr; 259 b->init=1; 260#if BIO_FLAGS_UPLINK!=0 261#if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES) 262#define _IOB_ENTRIES 20 263#endif 264#if defined(_IOB_ENTRIES) 265 /* Safety net to catch purely internal BIO_set_fp calls */ 266 if ((size_t)ptr >= (size_t)stdin && 267 (size_t)ptr < (size_t)(stdin+_IOB_ENTRIES)) 268 BIO_clear_flags(b,BIO_FLAGS_UPLINK); 269#endif 270#endif 271#ifdef UP_fsetmode 272 if (b->flags&BIO_FLAGS_UPLINK) 273 UP_fsetmode(b->ptr,num&BIO_FP_TEXT?'t':'b'); 274 else 275#endif 276 { 277#if defined(OPENSSL_SYS_WINDOWS) 278 int fd = fileno((FILE*)ptr); 279 if (num & BIO_FP_TEXT) 280 _setmode(fd,_O_TEXT); 281 else 282 _setmode(fd,_O_BINARY); 283#elif defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB) 284 int fd = fileno((FILE*)ptr); 285 /* Under CLib there are differences in file modes 286 */ 287 if (num & BIO_FP_TEXT) 288 _setmode(fd,O_TEXT); 289 else 290 _setmode(fd,O_BINARY); 291#elif defined(OPENSSL_SYS_MSDOS) 292 int fd = fileno((FILE*)ptr); 293 /* Set correct text/binary mode */ 294 if (num & BIO_FP_TEXT) 295 _setmode(fd,_O_TEXT); 296 /* Dangerous to set stdin/stdout to raw (unless redirected) */ 297 else 298 { 299 if (fd == STDIN_FILENO || fd == STDOUT_FILENO) 300 { 301 if (isatty(fd) <= 0) 302 _setmode(fd,_O_BINARY); 303 } 304 else 305 _setmode(fd,_O_BINARY); 306 } 307#elif defined(OPENSSL_SYS_OS2) 308 int fd = fileno((FILE*)ptr); 309 if (num & BIO_FP_TEXT) 310 setmode(fd, O_TEXT); 311 else 312 setmode(fd, O_BINARY); 313#endif 314 } 315 break; 316 case BIO_C_SET_FILENAME: 317 file_free(b); 318 b->shutdown=(int)num&BIO_CLOSE; 319 if (num & BIO_FP_APPEND) 320 { 321 if (num & BIO_FP_READ) 322 BUF_strlcpy(p,"a+",sizeof p); 323 else BUF_strlcpy(p,"a",sizeof p); 324 } 325 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE)) 326 BUF_strlcpy(p,"r+",sizeof p); 327 else if (num & BIO_FP_WRITE) 328 BUF_strlcpy(p,"w",sizeof p); 329 else if (num & BIO_FP_READ) 330 BUF_strlcpy(p,"r",sizeof p); 331 else 332 { 333 BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE); 334 ret=0; 335 break; 336 } 337#if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN) 338 if (!(num & BIO_FP_TEXT)) 339 strcat(p,"b"); 340 else 341 strcat(p,"t"); 342#endif 343#if defined(OPENSSL_SYS_NETWARE) 344 if (!(num & BIO_FP_TEXT)) 345 strcat(p,"b"); 346 else 347 strcat(p,"t"); 348#endif 349 fp=fopen(ptr,p); 350 if (fp == NULL) 351 { 352 SYSerr(SYS_F_FOPEN,get_last_sys_error()); 353 ERR_add_error_data(5,"fopen('",ptr,"','",p,"')"); 354 BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB); 355 ret=0; 356 break; 357 } 358 b->ptr=fp; 359 b->init=1; 360 BIO_clear_flags(b,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */ 361 break; 362 case BIO_C_GET_FILE_PTR: 363 /* the ptr parameter is actually a FILE ** in this case. */ 364 if (ptr != NULL) 365 { 366 fpp=(FILE **)ptr; 367 *fpp=(FILE *)b->ptr; 368 } 369 break; 370 case BIO_CTRL_GET_CLOSE: 371 ret=(long)b->shutdown; 372 break; 373 case BIO_CTRL_SET_CLOSE: 374 b->shutdown=(int)num; 375 break; 376 case BIO_CTRL_FLUSH: 377 if (b->flags&BIO_FLAGS_UPLINK) 378 UP_fflush(b->ptr); 379 else 380 fflush((FILE *)b->ptr); 381 break; 382 case BIO_CTRL_DUP: 383 ret=1; 384 break; 385 386 case BIO_CTRL_WPENDING: 387 case BIO_CTRL_PENDING: 388 case BIO_CTRL_PUSH: 389 case BIO_CTRL_POP: 390 default: 391 ret=0; 392 break; 393 } 394 return(ret); 395 } 396 397static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size) 398 { 399 int ret=0; 400 401 buf[0]='\0'; 402 if (bp->flags&BIO_FLAGS_UPLINK) 403 UP_fgets(buf,size,bp->ptr); 404 else 405 fgets(buf,size,(FILE *)bp->ptr); 406 if (buf[0] != '\0') 407 ret=strlen(buf); 408 return(ret); 409 } 410 411static int MS_CALLBACK file_puts(BIO *bp, const char *str) 412 { 413 int n,ret; 414 415 n=strlen(str); 416 ret=file_write(bp,str,n); 417 return(ret); 418 } 419 420#endif /* OPENSSL_NO_STDIO */ 421 422#endif /* HEADER_BSS_FILE_C */ 423 424 425